G.f. C(x) satisfies: C(x) = x + 5*A(x)*B(x), where A(x) = x + 2*B(x)*C(x) and B(x) = x + 3*A(x)*C(x).

A229810

G.f. C(x) satisfies: C(x) = x + 5*A(x)*B(x), where A(x) = x + 2*B(x)*C(x) and B(x) = x + 3*A(x)*C(x).

Terms

    a(0) =1a(1) =5a(2) =25a(3) =215a(4) =1825a(5) =17525a(6) =172525a(7) =1772435a(8) =18615025a(9) =199711445a(10) =2176008625a(11) =24027883055a(12) =268226469025

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